The Queen was greeted by son Prince Charles as she arrived to attend her 90th birthday celebrations in the grounds of Windsor Castle.
For the special occasion, the monarch wore a sea green dress with lace overlay and matching jacket by Angela Kelly.
Prince Charles kissed his mother's hand when she arrived at the arena.
The Duchess of Cornwall wore a cream dress and embroidered coat by Fiona Clare.
The show featured 1,500 performers, 900 horses and told the story of the life of the Queen.
Gary Barlow was the first star to hit the stage, performing Something about this land from the musical Finding Neverland.
He was soon followed by Dame Helen Mirren, Dame Shirley Bassey, Kylie Minogue, Andrea Bocelli, Damian Lewis, Jess Glynne, Imelda Staunton, Jim Carter, Alfie Boe, James Blunt, Katherine Jenkins, Beverley Knight, Jennifer Saunders, Alan Titchmarsh and Martin Clunes.
The Queen and Prince Philip were joined by other members of the royal family, including Princes William and Harry, the Duchess of Cornwall and her granddaughters Princesses Beatrice and Eugenie.
The Duchess of Cambridge, who was sat next to Prince Philip, wore a Dolce and Gabbana dress combined with a red Zara jacket.
The event was hosted by Ant and Dec.
Her Majesty seemed to enjoy herself throughout the show. She smiled and applauded as the Royal Cavalry of Oman play 'Happy Birthday to You'.
The Duke of Edinburgh covers his ears during a gun salute as the King of Bahrain Hamad bin Isa Al Khalifa and the Queen look on. The King of Bahrain was invited by the monarch.
Prince Harry speaking to the King of Bahrain.
Katherine Jenkins performed I Vow to Thee My Country.
Scenes from the marriage of the Queen and her husband Prince Philip, Duke of Edinburgh were shown during the event. Dame Helen Mirren said: The marriage is "an inspiration to us all".
The two-hour event took the Queen through the key events in her life - a reminder that she had not only reached a record-breaking reign, but has also been a first-hand witness to some of the most momentous events of the past century.
A parade of the Queen's own horses took to the arena, ridden by, among others, Earl of Wessex and Lady Louise Windsor.
The Queen's daughter, Princess Anne, also took part.
The real stars of the show were the horses and their riders, who had travelled from as far as Chile, Canada, Oman and Azerbaijan to perform impressive stunts for the Queen.
Shirley Bassey closed the show singing her hit song Diamonds are Forever.